No reverse gear? No problem for this 'technician, electrical & computer engineer' (VIDEO)

What happens when the reverse gear in your transmission goes out and you can't get it fixed right away?

If you are a self described 'technician, electrical and computer engineer' named Mark you might do this.

Video of Mark's genius invention quickly shot to the top spot on the front page of reddit Friday morning.

So how did he build it?

He made a video for that too.